Using -no-webkit breaks build

Using option -no-webkit in qt build options causes build to break, the output:

moc helpviewer_p.h
moc indexwindow.h
moc installdialog.h
moc mainwindow.h
helpviewer_qwv.cpp:168:1: error: expected class-name before '{' token
helpviewer_qwv.cpp:173:13: error: 'QWebPage' does not name a type
helpviewer_qwv.cpp:174:32: error: 'WebAction' has not been declared
helpviewer_qwv.cpp:176:42: error: 'QWebFrame' has not been declared
helpviewer_qwv.cpp:177:41: error: 'NavigationType' has not been declared
helpviewer_qwv.cpp: In constructor 'HelpPage::HelpPage(QObject*)':
helpviewer_qwv.cpp:189:7: error: class 'HelpPage' does not have any field named 'QWebPage'
helpviewer_qwv.cpp: At global scope:
helpviewer_qwv.cpp:197:1: error: 'QWebPage' does not name a type
helpviewer_qwv.cpp:207:30: error: variable or field 'triggerAction' declared void
helpviewer_qwv.cpp:207:30: error: 'WebAction' was not declared in this scope
helpviewer_qwv.cpp:207:48: error: expected primary-expression before 'bool'
moc preferencesdialog.h
moc qtdocinstaller.h
make[4]: *** [.obj/release-shared/helpviewer_qwv.o] Error 1
make[4]: *** Waiting for unfinished jobs....
moc remotecontrol.h
make[4]: Leaving directory `/mnt/ext3/rpm_build_tree/BUILD_mageia/qt/tools/assistant/tools/assistant'
make[3]: *** [sub-assistant-make_default-ordered] Error 2
make[3]: Leaving directory `/mnt/ext3/rpm_build_tree/BUILD_mageia/qt/tools/assistant/tools'
make[2]: *** [sub-tools-make_default-ordered] Error 2
make[2]: Leaving directory `/mnt/ext3/rpm_build_tree/BUILD_mageia/qt/tools/assistant'
make[1]: *** [sub-assistant-make_default-ordered] Error 2
make[1]: Leaving directory `/mnt/ext3/rpm_build_tree/BUILD_mageia/qt/tools'
make: *** [sub-tools-make_default-ordered] Error 2